JPH1051997A - Linking actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To convert the rotational force of a motor into a linear actuating force with a simple mechanism, by putting a cylindrical spring guide pipe on the output shaft of the motor, housing an actuating spring which slides in the axial direction in the guide pipe, and then, protruding outward one end of the actuating spring from a slit formed through the guide pipe as a working piece. SOLUTION: An electric motor 1 is fixed to a frame board 10 with set screws 91, and a cylindrical spring guide pipe 2 is put on the rotation output shaft 11 of the motor 1. Then, a bottom plate 21 provided at one end of the pipe 2 is fixed to the cover member of the motor 1 with set screws 92, and an actuating spring 3 which slides in the axial direction is housed in the internal space section 22 of the pipe 2. Then, one end of the spring 3 is protruded outward from a slit 23 formed through the pipe 2 in the length direction, and a projecting section 31 of the spring 3 is used as a working piece which linearly moves a member to be driven forward and backward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel actuating device capable of converting a rotational force of a motor into a linear actuating force for use.

[0002]

2. Description of the Related Art Heretofore, the most common type of operating device that exhibits a linear operating force is a solenoid that linearly displaces a plunger.

[0003] Although the structure of the solenoid is relatively simple,
Problems such as very short strokes, low operating force at the beginning of the stroke and excessive operating force at the end where less operating force is required, or noise at the end of the stroke as well There is.

In order to obtain a linear operating force by using an electric motor as another conventional operating device, in addition to a conversion mechanism such as a pinion and a rack, in order to avoid a motor burnout accident. Therefore, there is a problem in that the clutch mechanism, the brake mechanism, and the like are required, and the entire structure is complicated.

[0005]

SUMMARY OF THE INVENTION The operating device of the present invention has been proposed in order to solve all of the above problems.

[0006] That is, regardless of whether the rotational force of the motor is converted into a linear operating force and utilized, the overall mechanism is simplified, and the spiral which is one of the constituent members at both ends of the stroke is used. The present invention has been proposed for the purpose of eliminating the need for a clutch mechanism or the like by idling an operating spring having a shape like that, making the operation quiet, and making it possible to easily change the stroke.

[0007]

In order to achieve the above object, an actuating device according to the present invention comprises a cylindrical spring guide tube fixedly fitted coaxially with a rotation output shaft of a motor; A spiral operating spring is accommodated in the inside of the spring so that it can slide in the axial direction; at least one end of the operating spring projects outward from a slit formed along the length direction of the spring guide tube, and is driven by the driven spring. The rotary output shaft of the motor is provided with a projecting piece protruding toward the inner wall of the spring guide tube and capable of being fitted into the pitch gap of the operating spring. Reciprocating in the longitudinal direction of the spring guide tube by the guide of the projecting piece that rotates together with the rotation; the spring guide tube has stopper means for both ends of the stroke in the reciprocation of the operating spring; Passing , Protrusion on the rotary output shaft in the middle region of the stroke of the operating spring is engageably inserted into the pitch gap of the working spring, the opposite ends of the stroke as a constituent condition that in which the engagement input is released.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. The first shown in FIGS.
In the embodiment, reference numeral 1 denotes an electric motor fixed to the frame plate 10 with mounting screws 91, and the motor 1 is capable of arbitrarily rotating forward and reverse.

Reference numeral 2 denotes a cylindrical bottomed spring guide cylinder which is coaxially and fixedly fitted to the rotation output shaft 11 of the motor 1, and a bottom plate provided at one end in the length direction in the illustrated example. Although 21 is fixed to the cover member of the motor 1 by a set screw 92, it goes without saying that the spring guide cylinder 2 may be fixed to another immovable member such as the frame plate 10, for example.

A helical operating spring 3 is mounted in the inner space 22 of the spring guide tube 2 as a sparsely wound coil spring so as to be slidable in the axial direction.

The spiral operating spring 3 is usually made of a steel wire, but may be made of a tough synthetic resin material having appropriate elasticity. The strength, number of turns, length, etc. of the spring 3
It can be arbitrarily selected in accordance with the specifications of the operating device, similarly to a normal coil spring.

At least one end of the operating spring 3 is projected outward from a slit 23 formed along the length of the spring guide tube 2 and its projection 31 acts on a driven member (not shown). It is a piece.

The operating spring 3 having such an action piece 31
Can be manufactured by additionally processing an existing sparsely wound coil spring.

On the other hand, the rotary output shaft 11 of the motor 1 protruding into the spring guide cylinder 2 through the through hole 24 of the bottom plate 21 is provided with a pin-shaped protrusion 41 via a cylindrical mounting base 4. .

The projecting piece 41 is projected radially toward the inner wall of the spring guide cylinder 2 and can be fitted into the continuous pitch gap of the operating spring 3 from both ends (see FIG. 2).

The fixing of the projecting piece 41 to the mounting base 4 is performed by a driving fitting means or the like, and the fixing of the mounting base 4 to the rotary output shaft 11 is performed by a screwing means 93 or the like.

The operating spring 3 is reciprocated in the length direction of the spring guide cylinder 2 by guide guide along the pitch gap of the projecting piece 41 which rotates together with the forward / reverse rotation of the rotary output shaft 11 as described later. The spring guide cylinder 2 has arbitrary stopper means for both ends of the stroke in the reciprocation of the operation spring 3.

In the stopper means in the first embodiment, the bottom plate 21 of the spring guide cylinder 2 plays the role at the left end of the stroke of the operating spring 3 (see FIG. 1), and the right end of the slit 23 at the right end of the stroke. The part 23a plays that role (see FIG. 3).

The projecting piece 41 on the rotary output shaft 11 is
As shown in FIG. 2, it is engaged in the pitch gap of the operating spring 3 over the entire length of the intermediate region of the stroke of the operating spring 3, and as shown in FIGS. The entry is released.

The operation of the first embodiment will be described in more detail. In the non-operating state of FIG. 1, the spiral operating spring 3 is at the left position of the spring guide tube 2, and the projection 41 on the rotary output shaft 11 of the motor 1 is displaced rightward from the pitch gap of the operating spring 3. The operating spring 3 is held between the bottom plate 21 of the spring guide cylinder 2 and the protruding piece 41 in the longitudinal direction thereof, and is maintained in a slightly compressed state.

In this state, when the rotation output shaft 11 of the motor 1 rotates counterclockwise as shown by the arrow A (counterclockwise as viewed from the right end in FIG. 1), the projecting piece 41 rotating in the same direction becomes
The operation spring 3 enters the spiral pitch gap.

The projecting piece 41 which rotates around the axis at a fixed position in the axial direction of the spring guide cylinder 2 forms a wedge action between the coil portion of the operating spring 3 inclined with respect to the axis of the spring guide cylinder 2. Thereby, the operating spring 3 is slid in the direction of arrow B (rightward) by the guide of the spring guide tube 2.

At this time, the operating piece 31 of the operating spring 3 inserted into the slit 23 of the spring guide cylinder 2 and protruding outside.
The (projection) has a function of preventing the operation spring 3 from rotating with respect to the spring guide cylinder 2.

When the actuating spring 3 reaches the right end of the stroke shown in FIG. 3 through the intermediate region of the stroke shown in FIG. 2, the operating piece 31 which is a part of the actuating spring 3 becomes the right end 23a of the slit 23 which is the stopper means. While being stopped at the same time, the projecting piece 41 that continues to rotate is pulled out to the left from the pitch gap of the operating spring 3, and the operating spring 3 is
It is held in a slightly compressed state by being sandwiched between 3 a and the protruding piece 41. Here, the motor 1 is temporarily stopped.

During the movement of the operating spring 3, the operating piece 31 of the operating spring 3 exerts a push operation or the like on the driven member (not shown) with a substantially constant force in the direction of arrow B, so that, for example, the door chain is automatically removed. , Etc.

The control of starting and stopping the electric motor 1 or switching between forward and reverse rotation may be performed manually or automatically.

When the output shaft 11 of the motor 1 is rotated in the direction opposite to the arrow A in the state shown in FIG. 3, the operating spring 3 is displaced backward to the left in accordance with the action of the forward rotation. Return to
Here, the power supply to the motor 1 is usually cut off.

In this operating device, when the operating spring 3 is moved backward, a pressing operation may be performed on a driven member (not shown).

In the apparatus of the present invention, when the operating spring 3 is located at the left end or the right end of the stroke as shown in FIG. 1 or FIG. 3, even if the rotor of the motor 1 continues to rotate excessively due to inertia or failure, the operating spring 3 can be operated. In contrast, the projecting piece 41 on the rotary output shaft 11 does not exert any rotational force and only idles while contacting the end face of the operating spring 3, so there is no risk of burning of the motor 1 at all.

On the contrary, even if the driven member stops in the middle of the operation stroke, the projection 4
Since the motor 1 only idles while contacting its end face, there is no danger of burning of the motor 1 at all.

In the second embodiment shown in FIG. 4, the mounting structure of the motor 1 and the spring guide tube 2 is different from that of the first embodiment.
Here, only the differences will be mainly described.

That is, in the second embodiment, the members indicated by the same reference numerals as those in the first embodiment (FIGS. 1 to 3) represent members having the same effect, and the description of those members will be omitted. .

In FIG. 4, reference numeral 5 denotes an attachment member having an L-shaped cross section, one of which is fixed to a frame plate 10 and the other is a screw 9
4, the spring guide cylinder 2 and the motor 1 are fixed.

The motor 1 has its end face applied to the bottom plate 21 of the cylindrical spring guide tube 2 from the inside, and the spring guide tube 2 is fixed together with the motor 1 to the mounting member 5 by calling it with screws 94. .

The outer diameter of the cross section of the body of the motor 1 is formed smaller than the inner diameter of the spring guide tube 2, and a cylindrical shape is provided between the body of the motor 1 and the spring guide tube 2. A gap 6 to be formed is formed.

This gap 6 forms a passage for the stroke of the operating spring 3 which slides left and right in the spring guide cylinder 2 in FIG. 4. When the operating spring 3 is at the left position, the spring 3 is outside the motor 1. Fit concentrically with

The mounting base 4 fixed to the rotary output shaft 11 of the motor 1 with a set screw or the like (not shown) has a flat, multi-stage disc shape in this example. Is still protruding.

The operation of the operating device according to the second embodiment is similar to the operation of the first embodiment described above, and a description thereof will be omitted. In this example, the overall length of the actuator can be reduced.

[0039]

The operating device of the present invention described above has the following features.
The following effects are obtained. First, regardless of whether the rotational force of the motor is converted into a linear operating force and used, the overall mechanism is extremely simple.

Further, since the operation spring can be idled at both ends of the reciprocating stroke, there is no danger of burnout even if the motor continues to rotate due to a failure or the like.

Further, the operation force is generated by the slide between the protruding piece and the operation spring during operation, so that the operation is quiet.

In addition, the working stroke can be changed simply by changing the working spring and the spring guide tube to those having different lengths. The working force can be easily changed by changing the wire diameter and coil diameter of the working spring. Various effects can be achieved.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional front view showing a state before an operation in a first embodiment of an operation device of the present invention.

FIG. 2 is a partial vertical sectional front view showing an intermediate state of the operation.

FIG. 3 is a partial vertical sectional front view showing a state after the operation.

FIG. 4 is a partial vertical sectional front view showing a second embodiment of the operating device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 11 Rotation output shaft 2 Spring guide cylinder 22 Space 23 Slit 3 Operating spring 31 Working piece 41 Protrusion

Claims (1)

[Claims] 1. A cylindrical spring guide cylinder is fixedly fitted coaxially with a rotation output shaft of a motor; a spiral operating spring is accommodated inside the spring guide cylinder so as to be slidable in the axial direction. That at least one end of the operating spring projects outward from a slit formed along the length of the spring guide cylinder to serve as an operating piece for the driven member; A projection protruding toward the inner wall and capable of being fitted into a pitch gap of the operation spring; the operation spring is guided by the projection that rotates together with the forward and reverse rotation of the rotary output shaft, and has a length of the spring guide tube. The spring guide cylinder has stopper means for both ends of the stroke in the reciprocation of the operating spring; and the projection on the rotary output shaft operates in an intermediate range of the stroke of the operating spring. Spring An actuating device that is engaged in the pitch gap of the above, and that the engagement is released at both ends of the stroke.